What's eating my fastigiata yew?

Fastigiata Yew (Irish Yew) grows in a tight columnar form that concentrates pest pressure in the dense interior. Black vine weevil, scale, and mealybugs thrive in the enclosed microclimate. Vine weevil is the most serious threat in UK and garden settings. Deer and pigeons target the columnar silhouette, especially in winter.

Notched margins on needles; root-feeding larvae cause collapse of entire columns — the tight habit makes damage visible only late in the cycle. Apply Steinernema kraussei nematodes to root zone soil in late summer. Use sticky barriers at the base to trap adults. Chemical soil drench for severe infestations.

Dense white wax colonies in the interior stem crotches; foliage yellows from the center out; sooty mold follows honeydew deposits. Open the interior by removing crossing stems. Apply systemic insecticide or insecticidal soap solution directed into the center of the column.

Brown hemispherical scales on stems; mass crawler emergence in June coats new growth; persistent infestations weaken and thin the foliage. Horticultural oil in late winter; insecticidal soap spray targeting crawlers. Prune infested stems to open the canopy.

Foliage stripped from accessible branches in winter; antler rub can strip bark from the lower trunk. Repellent sprays and physical tree guards. The columnar form makes full netting practical for smaller specimens.